Concept:The conclusion must directly match the idea expressed in the statement.
Explanation:The statement says that persistent effort is the key to achieving excellence.
This means sustained effort is necessary for excellence.
Conclusion I states that continuous effort is essential for excellence, which directly follows from the statement.
Conclusion II states that excellence can be achieved without sustained effort, which contradicts the statement.
So, only conclusion I follows.
Answer:Option A. if only conclusion I follows.